Blasting Facility - Air System Design

You cannot rely on a receiver alone. The receiver has to stay charged to supply the air to the pots, If you are running all your blast pots at the same time, you need 822cfm of air to "keep up". For a manual blast operation, when probably only 4 pots are going at the same time, while the others are reloading, or changing work pieces, then just maybe enough. Compressor's wear over time, and produce less, and you will have line losses which will drag pressure down. Few compressors can run flat out 100% of the time. I would suggest fewer pots, a bigger compressor, or an additional compressor. You also need to check your compressor rating, can it supply 145 psi @ 750cfm, usually the volume pumped drops off as the pressure increases.

I agree to you that a single compressor alone at 750CFM, 145psig could not supply 100% to the total required CFM which are 822 CFM. what if i'm going to use three compressors with 750CFM each at 145psig with 75% efficiency, Is my receiver's operating pressure will not increase during operation of three compressors? is my receiver's operating pressure is enough to supply the 06 pots operating simultaneously within 18 hours of operation?

Pressure is not the issue - if the compressor is set to max pressure of 145psi, then when they reach that pressure, they will unload. each compressor has a small volume tank to prevent surges built in. The 145 psi is the max pressure the receiver will reach. Bigger volume tank is always better to a small one, and large diameter piping to feed and supply to the pots as well of course. Three compressors will be sufficient.

Thank you very much..